The method we are going to use is resetting the PCID, so that each time kaspersky thinks its a new computer and gives us a month of fully functional and upgradable trial.
SO the method is as explained below :-
1) First of all delete the existing key if you have
2) Goto Setting, then select Option, Uncheck the "Enable Self Defense" and click OK
3) Now right-click the kaspersky icon from taskbar and click on "Exit".
4) You will get a promt like this . Click "Yes"
6) Now goto HKEY_LOCAL_MACHINE ---->SOFTWARE ---->KASPERSKYLAB ---->PROTECTED ---->AVP9 ---->ENVIRONMENT .
7) Now in the right hand side you can see PCID. Double click it and change the last two values before the flower bracket and click ok.
eg:- The last two values are "D7"... So i change it to "F9"...
8) Now open kaspersky again and you will see this.
9) Select "Activate Trial License" and click next.
10) Now enable Self-Defence and you are good to go.